Agents also took records, computers and froze the bank accounts at the "Liberty Dollar" headquarters during the Thursday raid, Bernard von NotHaus, founder of the National Organization for the Repeal of the Federal Reserve Act & Internal Revenue Code, said in a posting on the group's Web site.

The organization, which is critical of the Federal Reserve, has repeatedly clashed with the federal government, which contends that the gold, silver and copper coins it produces are illegal. NORFED claims its Liberty Dollars are inflation free and can restore stability to financial markets by allowing commerce based on a currency that does not fluctuate in value like the U.S. dollar.

"They're running scared right now and they had to do something," von NotHaus told The Associated Press Friday. "I'm volunteering to meet the agents and get arrested so we can thrash this out in court."

Wendy Osborne, a spokeswoman for the FBI's Indianapolis office, declined to comment and referred all questions to the U.S. attorney's office for the Western District of North Carolina. Suellen Pierce, a spokeswoman for that office, also declined to comment.

The raid comes eight months after von NotHaus filed a lawsuit in federal court in Evansville seeking a permanent injunction to stop the federal government from labeling the Liberty Dollar an illegal currency.

The U.S. Mint issued a warning this year that the Liberty Dollar violated the Constitution and warned consumers against using them unsuspectingly.

Paul's campaign said it had not authorized production of the Ron Paul dollars.

"We were aware they existed, but we didn't have any affiliation with them," said Jesse Benton, a spokesman for Ron Paul's campaign. "He didn't ask our permission to make them."

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